Ruler



FIG. 1 is a perspective view of a ruler, showing my design.

FIG. 2 is another perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines are for environmental structure, boundaries, or illustrative purposes only and form no part of the claimed designs to be patented. 

CLAIM The ornamental design for a ruler, as shown and described. 